test check valve

tommylg · Post by **tommylg** » 29 Jun 2021, 05:49

1998 S70 Glt.
I have had a 410 code a few times and have done resets w/a scanner.
Now it is time to figure out the issue.
Fisrt thing is to test the check valve. I belive it is a one way valve. How do I do that and is it located near the radiator?

Additionally, here is an image of my Prancing Moose sunscreen, courtesy of Dave Barton, kinda cool.

Thanks and have a great day,
Tommy

Post by **volvolugnut** » 29 Jun 2021, 07:42

Once you locate the check valve, use the handy vacuum tester and assorted hose adapters to try to hold vacuum both ways. One side should hold steady vacuum for several minutes and the other side should have no flow restriction.

volvolugnut

tommylg · Post by **tommylg** » 01 Jul 2021, 16:28

With the air filter housing up I can almost stop the motor - what does this mean?
Thanks, go Vandy, ha.
Tommy

tommylg · Post by **tommylg** » 01 Jul 2021, 17:12

So, I found that the 90* hose is degraded.
What size is this elbow and I really need an answer to my original post, if you please.
Tommy

Post by **abscate** » 02 Jul 2021, 06:32

Need some pictures, I’m not sure what parts you are asking about

tommylg · Post by **tommylg** » 02 Jul 2021, 15:46

90* hose coming off the sas check valve replaced.
I will run a scan in the am.
The air sucking under the air filter housing - that almost kills the motor - means I have zero vacumn leaks.
Tommy